I could not find the file either, so I did this Windows search (ugh!) and it "found" it, but it within in a cabinet (.cab) file and not a separate file called dot4scan.sys.
The Windows search will look inside the .cab files so it "looks" like it found the file of interest.
Is that consistent with what you see, hamluis?
A cabinet file is a compressed file with lots of other stuff in it.
The cabinet file with dot4scan.sys in it is called driver.cab.
On my system, the driver.cab file is in c:\windows\driver cache\i386
Maneuver your way over there with Explorer, highlight the driver.cab file, right click and Open to reveal the contents.
Locate the dot4scan.sys file, right click, Extract and choose a destination folder.
When you are prompted for the file again during your installation, browse to the destination folder where dot3scan.sys is located or put the file where your installation is looking.
A smart installation program may be happy with just being pointed to the .cab file when looking for .sys files.
The DOS person I am, first I figured this process out from a command prompt, so if you need those instructions, holler.
Edited by joseibarra, 29 June 2009 - 04:57 PM.